Cosmetic composition for inhibiting sebum hypersecretion

ABSTRACT

Provided are a cosmetic composition for inhibiting sebum hypersecretion and a method of inhibiting sebum hypersecretion using the same. According to the present invention, there may be provided the cosmetic composition of inhibiting and adjusting sebum secretion which is harmless to the human body with excellent skin safety and decreases activity of peroxisome proliferator activated receptor gamma (PPAR-γ) to fundamentally decrease sebum overproduction, thereby providing the skin with an effective effect, and a method of using the same.

CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority under to Korean Patent Application No.10-2019-0069261 filed Jun. 12, 2019, the disclosure of which is herebyincorporated by reference in its entirety.

TECHNICAL FIELD

The following disclosure relates to a cosmetic composition forinhibiting sebum hypersecretion.

BACKGROUND

A sebaceous gland in the skin is a complete secreting gland whichsecretes a mixture of lipids known as sebum. When sebum is overproducedin a sebaceous gland, dermatological disorders or skin diseases such asacne and seborrheic dermatitis may be caused.

Meanwhile, production of sebum is adjusted by factors influencingproliferation and differentiation of sebaceous gland cells. According toreports, it is known that the production of sebum is adjusted by factorssuch as male hormones, female hormones, insulin-like growth factors(IGF-1), and peroxisome proliferator activated receptors (PPAR). Thesebum produced by sebaceous gland cells is secreted to a skin surfacevia a hair follicle tube, and it is known that the overproduced sebumchanges a structure of lipids between corneocytes on the skin surface todeteriorate a skin barrier function. In addition, when the sebum isoverproduced, seborrheic scalpitis bacterium and the like may beoverproduced to act as a cause of seborrheic dermatitis, scalpitis, andthe like. For this reason, appropriate removal of overproduced sebum andinhibition of overproduced sebum are important for a skin barrierfunction and maintenance of healthy skin.

For removing the overproduced sebum, hygienic methods such as personalface washing with soap and shampoo use are performed. In addition, as adrug therapy, antifungal agents such as selenium sulfide, azole-basedcompounds, sodium sulfacetamide, and Terbinafine; and anti-inflammatoryagents such as steroids; and the like have been used for patients havingskin disorders or skin diseases such as acne and seborrheic dermatitis.However, since the drug components as such are for relieving symptoms ofacne, seborrheic dermatitis, and the like, and sebum was notfundamentally inhibited or improved.

Thus, fundamental inhibition or improvement of sebum overproduction maybe a method of preventing or treating skin diseases in which sebumoverproduction is involved.

SUMMARY

An embodiment of the present invention is directed to providing acosmetic composition for inhibiting sebum hypersecretion and a method ofusing the same.

Particularly, an embodiment of the present invention is directed toproviding a cosmetic composition which may effectively adjust sebumproduction by decreasing activity of PPAR-γ influencing maturation ofsebaceous gland cells, and a method of inhibiting sebum hypersecretionby applying the cosmetic composition to the skin.

Particularly, an embodiment of the present invention is directed toproviding a stable cosmetic composition which may be formulated intovarious formulations without cytotoxicity and skin side effects, and amethod of using the same.

In one general aspect, a cosmetic composition for inhibiting sebumhypersecretion includes a compound represented by the following ChemicalFormula 1 as an effective component:

wherein

R₁ and R₂ are independently of each other (C1-C30) alkyl; and

R₃ is

or a substituted or unsubstituted amino acid group, in which R₁₁ ishydroxy (C1-C30) alkyl.

In the cosmetic composition for inhibiting sebum hypersecretionaccording to an exemplary embodiment of the present invention, R₃ inChemical Formula 1 may be selected from the following structures:

wherein

R₂₁ and R₂₂ are independently of each other hydrogen or (C1-C7) alkyl.

In the cosmetic composition for inhibiting sebum hypersecretionaccording to an exemplary embodiment of the present invention, thecompound of Chemical Formula 1 may be a compound of Chemical Formula 2:

wherein

R₁ and R₂ are independently of each other (C1-C30) alkyl;

R₂₁ is hydrogen or C1-C7 alkyl; and

R₂₃ is C1-C7 alkyl.

In the cosmetic composition for inhibiting sebum hypersecretionaccording to an exemplary embodiment of the present invention, R₁ and R₂in Chemical Formula 2 may be independently of each other (C4-C30) alkyl;R₂₁ may be hydrogen, methyl, ethyl, or n-propyl; and R₂₃ may be methyl,ethyl, or n-propyl.

In the cosmetic composition for inhibiting sebum hypersecretionaccording to an exemplary embodiment of the present invention, thecompound may be included at 0.001 to 50 wt %, based on a total weight ofthe cosmetic composition.

The cosmetic composition for inhibiting sebum hypersecretion accordingto an exemplary embodiment of the present invention may further includea solid powder.

In the cosmetic composition for inhibiting sebum hypersecretionaccording to an exemplary embodiment of the present invention, when thecosmetic composition further includes the solid powder, the solid powdermay be included at 0.01 to 5 wt %, based on the total weight of thecosmetic composition.

The cosmetic composition for inhibiting sebum hypersecretion accordingto an exemplary embodiment of the present invention may decreaseactivity of peroxisome proliferator activated receptor gamma (PPAR-γ) toinhibit overproduction of sebum.

The cosmetic composition for inhibiting sebum hypersecretion accordingto an exemplary embodiment of the present invention may be formulatedinto an emollient, an astringent, a nutritional toner, an eye cream, anourishing cream, a massage cream, a cleansing cream, a cleansing foam,a cleansing water, a powder, an essence, a face pack, or the like.

In another general aspect, a method of inhibiting sebum hypersecretionincludes applying a composition including the compound represented byChemical Formula 1 as an effective component to the skin.

Other features and aspects will be apparent from the following detaileddescription, the drawings, and the claims.

BRIEF DESCRIPTION OF THE DRAWINGS

The patent or application file contains at least one drawing executed incolor. Copies of this patent or patent application publication withcolor drawing(s) will be provided by the Office upon request and paymentof the necessary fee.

FIGS. 1 and 2 show results of expression inhibition of PPAR-γ which is amain lipid synthesis transcription factor in sebaceous gland cells.

FIG. 3 shows an effect of lipid synthesis inhibition for eachconcentration in human sebaceous gland cells by oil red o staining.

FIG. 4 shows an effect of lipid synthesis inhibition for eachconcentration in human sebaceous gland cells by nile red staining.

DETAILED DESCRIPTION OF EMBODIMENTS

The advantages, features and aspects of the present invention willbecome apparent from the following description of the embodiments withreference to the accompanying drawings, which is set forth hereinafter.The present invention may, however, be embodied in different forms andshould not be construed as limited to the embodiments set forth herein.Rather, these embodiments are provided so that this disclosure will bethorough and complete, and will fully convey the scope of the presentinvention to those skilled in the art. The terminology used herein isfor the purpose of describing particular embodiments only and is notintended to be limiting of example embodiments. As used herein, thesingular forms “a”, “an”, and “the’ are intended to include the pluralforms as well, unless the context clearly indicates otherwise. It willbe further understood that the terms “comprises” and/or “comprising”,when used in this specification, specify the presence of statedfeatures, integers, steps, operations, elements, and/or components, butdo not preclude the presence or addition of one or more other features,integers, steps, operations, elements, components, and/or groupsthereof.

Hereinafter, the cosmetic composition for inhibiting sebumhypersecretion according to the present invention will be described,however, technical terms and scientific terms used herein have thegeneral meaning understood by those skilled in the art to which thepresent invention pertains unless otherwise defined, and a descriptionfor the known function and configuration which may unnecessarily obscurethe gist of the present invention will be omitted in the followingdescription.

The term “sebum” in the present specification refers to an oilysecretion secreted on a hair surface and a skin epidermal surface fromsebaceous glands. When the sebum is excessively secreted, skin diseasessuch as acne get worse, enlarged pores due to acne are promoted, andskin diseases may be caused, like occurrence of dermatitis. In addition,sebum overproduction in the present specification may refer to sebumhypersecretion by sebaceous gland cells, and may be a term having ameaning equivalent to the expressions of sebum hypersecretion and thelike.

The term “applying” in the present specification refers to bringing thecomposition according to the present invention into contact with theskin of an individual by an optional appropriate method, which isintended to absorb the composition into the skin.

The term “improvement” used in the present invention refers to allactions to make a state better, or change a state advantageously byapplying the composition according to the present invention.

The term “alkyl” in the present specification includes both a linearform and a branched form.

The term “amino acid group” in the present specification refers to anamino acid residue derived from an amino acid molecular, andspecifically, the amino acid group refers to a substituent for formingan amide bonding by an amino end of the amino acid. As an example, theamino acid group may include Asp=D=aspartic acid group; Ala=A=alaninegroup; Arg=R=arginine group; Asn=N=asparagine group; Gly=G=glycinegroup; Glu=E=glutamic acid group; Gln=Q=glutamine group; His=H=histidinegroup; Ile=I=isoleucine group; Leu=L=leucine group; Lys=K=lysine group;Met=M=methionine group; Phe=F=phenylalanine group; Pro=P=proline group;Ser=S=serine group; Thr=T=threonine group; Trp=W=tryptophan group;Tyr=Y=tyrosine group; Val=V=valine group; derivatives thereof, and thelike.

In addition, the singular form used in the present specification may beintended to also include a plural form, unless otherwise indicated inthe context.

In addition, units used in the present specification without particularmention is based on weights, and as an example, a unit of % or ratiorefers to a wt % or a weight ratio.

In addition, the numerical range used in the present specificationincludes all values within the range including the lower limit and theupper limit, increments logically derived in a form and span in adefined range, all double limited values, and all possible combinationsof the upper limit and the lower limit in the numerical range defined indifferent forms.

In addition, in the present specification, the expression, “comprise” isan open-ended description having a meaning equivalent to the expressionsuch as “is/are provided with”, “contain”, “have”, or “is/arecharacterized”, and does not exclude elements, materials or processeswhich are not further listed.

The present applicant suggests the present invention for providing anovel use of an amide compound represented by the following ChemicalFormula 1, which may be applied stably to the human body without sideeffects, that is, a cosmetic composition having excellentefficiency/effects in sebum hypersecretion inhibition, and a method ofusing the same.

The amide compound according to the present invention shows an excellenteffect in inhibiting and decreasing expression of peroxisomeproliferator activated receptor gamma (PPAR-γ). That is, the amidecompound according to the present invention effectively inhibits sebumhypersecretion, by inhibiting factors influencing proliferation anddifferentiation of cells related to sebum production. Furthermore, sincethe amide compound of the present invention not only has the effectwhich is remarkable as compared with various compositions derived fromconventional natural herb medicines, but also does not cause sideeffects even when applied to the human body without toxicity to theskin, the compound has excellent utilization as the cosmeticcomposition.

In particular, since the amide compound according to the presentinvention effectively inhibits expression of peroxisome proliferatoractivated receptor gamma, effective effects for not only the skindiseases resulting therefrom but also diseases of various aspects andthe like are expected.

Hereinafter, the cosmetic composition for inhibiting sebumhypersecretion according to the present invention will be described.

The cosmetic composition for inhibiting sebum hypersecretion accordingto an exemplary embodiment of the present invention may include acompound represented by the following Chemical Formula 1, that is, anamide compound. Here, the cosmetic composition for inhibitinghypersecretion may be a cosmetic composition for inhibiting andadjusting sebum secretion.

wherein

R₁ and R₂ are independently of each other (C1-C30) alkyl; and

R₃ is

or a substituted or unsubstituted amino acid group, in which R₁₁ ishydroxy (C1-C30) alkyl.

In addition, the cosmetic composition for inhibiting sebumhypersecretion according to an exemplary embodiment of the presentinvention includes the compound as an effective component, therebyeffectively inhibiting overproduced sebum simultaneously with showingexcellence in lipid accumulation inhibition effect in the skin. Inparticular, the cosmetic composition may effectively inhibit formationof a comedone which is a basic lesion of acne, resulting from vigoroussebum secretion and follicle blockage therefrom, thereby effectivelyacting on prevention and improvement of skin diseases such as acne.

Thus, the cosmetic composition for inhibiting sebum hypersecretionaccording to an exemplary embodiment of the present invention may beusefully utilized as a cosmetic composition having a use of providing aneffective effect for prevention and improvement of skin diseases such asacne.

The cosmetic composition for inhibiting sebum hypersecretion accordingto an exemplary embodiment of the present invention is a very stablematerial and is easy for formulation development, and in terms of anexcellent activity decrease in peroxisome proliferator activatedreceptor gamma, R₃ in Chemical Formula 1 may be selected from thefollowing structures:

wherein

R₂₁ and R₂₂ are independently of each other hydrogen or (C1-C7) alkyl.

As an example, in the above structure, R₂₁ and R₂₂ may be independentlyof each other linear (C1-C7) alkyl.

As an example, in the above structure, R₂₁ and R₂₂ may be independentlyof each other methyl, ethyl, n-propyl, or the like.

Specifically, the compound of Chemical Formula 1 may be represented bythe following Chemical Formula 2:

wherein

R₁ and R₂ are independently of each other (C1-C30) alkyl;

R₂₁ is hydrogen or (C1-C7) alkyl; and

R₂₃ is (C1-C7) alkyl.

In the compound represented by Chemical Formula 2, R₁ and R₂ may beindependently of each other (C4-C30) alkyl; R₂₁ may be hydrogen, methyl,ethyl, or n-propyl; and R₂₃ may be methyl, ethyl, or n-propyl, in termsof excellent solubility and compatibility with solvents.

As an example, in Chemical Formula 2, R₁ and R₂ may be independently ofeach other selected from (C4-C25) alkyl.

As an example, in Chemical Formula 2, R₁ and R₂ may be independently ofeach other selected from (C4-C22) alkyl.

As an example, in Chemical Formula 2, R₁ and R₂ may be independently ofeach other selected from linear (C4-C10) alkyl.

In addition, the cosmetic composition for inhibiting sebum secretionaccording to an exemplary embodiment of the present invention includesthe compound represented by Chemical Formula as an effective component,thereby being formulated into various forms of cosmetic composition. Inaddition, the use amount of the effective component may be appropriatelyadjusted depending on not only implementation of an activity decreaseeffect of peroxisome proliferator activated receptor gamma to be desiredbut also requirements such as skin safety, ease during formulation, andthe like, of course.

The cosmetic composition for inhibiting sebum secretion according to anexemplary embodiment of the present invention may include the effectivecomponent at 0.001 to 50 wt %, based on the total weight of the cosmeticcomposition. The effective component may be included at specifically0.01 to 30 wt %, and more specifically 0.01 to 20 wt %.

As an example, the effective component may be included at 0.01 to 10 wt%.

As an example, the effective component may be included at 0.01 to 5 wt%.

As an example, the effective component may be included at 0.01 to 3 wt%.

In addition, the cosmetic composition for inhibiting sebum secretionaccording to an exemplary embodiment of the present invention iscombined with a solid powder to impart surprisingly remarkable synergyin not only sebum secretion inhibition but also hypersecreted sebuminhibition.

The solid powder may be selected from inorganic particles, organicparticles, organic and inorganic composite particles, and the like. Inaddition, the solid powder may be in the form of a sphere, a plate, andthe like.

The solid powder in the form of a sphere may be silica,polymethylmethacrylate, ethylene/acrylic acid copolymer, and the like.

As an example, the solid powder in the form of a sphere may have anaverage particle diameter of less than 5 μm.

The solid powder in the form of a plate may be talc, mica, boronnitride, barium sulfate, alumina, sericite, kaolin, and syntheticfluorophlogopite, and the like.

As an example, the solid powder in the form of a plate may have anaverage thickness of 0.1 to 1.0 μm and an average particle diameter of 1to 100 μm.

As an example, the solid powder in the form of a plate may have anaspect ratio of 10 or more. The aspect ratio means a thickness degree ofa cross section perpendicular to a widest cross section of the solidpowder in the form of a plate, and may mean the shortest diameter ratio.

In addition, the solid powder may be included at 0.01 to 5 wt % based onthe total weight of the cosmetic composition. The solid powder may beincluded at specifically 0.05 to 3 wt %, and more specifically 0.1 to 2wt %.

Hereinafter, the specific use of the present invention will bedescribed.

The use of the present invention may be an activator inhibitor ofperoxisome proliferator activated receptor gamma including the amidecompound described above as an effective component.

The activator inhibitor of peroxisome proliferator activated receptorgamma according to an exemplary embodiment of the present inventiondecreases activity of PPAR-γ to effectively inhibit sebum production,and thus, may be utilized in an in-vitro or in-vivo test, utilizing theuse.

In addition, the use of the present invention may be to provide a methodcapable of inhibiting activity of peroxisome proliferator activatedreceptor gamma, using the composition including the amide compound asdescribed above as an effective component. Specifically, the use of thepresent invention may be to provide a method for inhibiting sebumhypersecretion by applying the composition to the skin.

As an embodiment, the activator inhibitor and the composition ofperoxisome proliferator activated receptor gamma may be utilized forconfirming the effect of inhibiting hypersecreted sebum. That is, theymay be utilized as an evaluation indicator for confirming the effect ofinhibiting hypersecreted sebum.

As an embodiment, the activator inhibitor and the composition ofperoxisome proliferator activated receptor gamma may be utilized as anindicator for measuring the effect of prevention and improvement of skindiseases according to effective inhibition of hypersecreted sebum. Here,an example of the skin disease may be acne, seborrheic dermatitis, andthe like, but is not limited thereto.

In addition, the use of the present invention may be a cosmeticcomposition for inhibiting sebum hypersecretion.

Specifically, the use of the present invention may be a cosmeticcomposition for adjusting sebum secretion by decreasing activity ofperoxisome proliferator activated receptor gamma and inhibitinghypersecreted sebum.

As an embodiment, the cosmetic composition may be for prevention andimprovement of skin diseases such as acne and seborrheic dermatitis.

As an embodiment, the cosmetic composition may be for inhibitingformation of a comedone which is a basic lesion of acne.

Since the cosmetic composition for inhibiting sebum hypersecretionaccording to an exemplary embodiment of the present invention includesthe amide compound according to the present invention, it showsexcellence in the effect of inhibiting sebum secretion. Moreover, whenthe cosmetic composition is combined with a solid powder and applied toa formulation, it is noticeable that a surprisingly remarkable effect onsebum inhibition is shown.

The cosmetic composition according to an exemplary embodiment of thepresent invention may be mixed with purified water, oil, and the like,excluding the amide compound, the solid powder, and the like accordingto the present invention, and formulated into formulations of variousembodiments.

The oil is used without limitation as long as it is commonly used, ofcourse. A non-limiting example thereof may include one or a mixture oftwo or more selected from a hydrocarbon-based oil, a higher fattyalcohol-based oil, a glyceride-based oil, a silicone-based oil, anester-based oil, a vegetable oil, an animal oil, a fluorine-based oil,and the like.

In addition, the cosmetic composition according to an exemplaryembodiment of the present invention may further include an appropriateadditive which is commonly used and be formulated. Here, a non-limitingexample of the additive may include one or more selected from one ormore aqueous additives selected from a stabilizer, an emulsifier, athickening agent, a moisturizer, a liquid crystal film enhancer, a pHcontrolling agent, an antimicrobial, an aqueous polymer, a coatingagent, a metal ion sequestering agent, an amino acid, an organic amine,a polymer emulsion, a pH adjusting agent, a skin nutrient, ananti-oxidant, an anti-oxidant auxiliary agent, a preservative,flavoring, and the like; and one or more oily additives selected fromfat and oils, waxes, higher fatty acids, and higher alcohols.

Here, the aqueous additive is not limited, as long as it is commonlyused in the art, and a non-limiting example thereof may include one ormore selected from glycerin, dipropylene glycol, butylene glycol,pentylene glycol, methyl propanediol, sorbitol, diglycerin, erythritol,pentaerythritol, polybutyleneglycol-10, polyglycerin-3, polyglycerin-4,polyglycerin-6, polyglycerin-10, polyglycerin-20, polyglycerin-40,sorbeth-5, sorbeth-6, sorbeth-20, sorbeth-30, sorbeth-40, inositol,maltitol, maltose, mannan, mannitol, mannose, lactitol, lactose,dihydroxypropyl PG-glucoside, dithiaoctanediol, fructose, glucamine,methyl glucamine, glucose, 1,2,6-hexanethiol, methyl gluceth-10, methylgluceth-20, ozonized glycerin, phytantriol, thiglycerin, threitol,trimethylolpropane, xylitol, EDTA, guar gum, quince seeds, carrageenan,galactan, arabic gum, pectin, mannan, starch, xanthan gum, curdlan,methyl cellulose, hydroxy ethyl cellulose, carboxymethyl cellulose,methyl hydroxypropyl cellulose, chondroitin sulfuric acid, dermatansulfuric acid, glycogen, heparan sulfuric acid, hyaluronic acid, sodiumhyaluronate, tragacanth gum, keratan sulfuric acid, chondroitin,mucoitin sulfuric acid, hydroxyethyl guar gum, carboxymethyl guar gum,dextran, kerat sulfuric acid, locust bean gum, succinoglucan, caronicacid, chitin, chitosan, carboxymethyl chitin, agar, polyvinyl alcohol,polyvinyl pyrrolidone, carboxyvinyl polymer, sodium polyacrylate,polyethylene glycol, bentonite, methylparaben, propylparaben,phenoxyethanol, 1,2-hexanediol, ethylhexyl glycerin, and the like. Inaddition, the oily additive is not limited as long as it is a rawmaterial commonly used in the art, and a non-limiting example thereofmay include liquid oils such as triglyceride, glycerin trioctanoate, andglycerin triisopalmitate, solid oils such as palm oil, hydrogenated palmoil, palm oil, hydrogenated oil, and hydrogenated castor oil, beeswax,candelilla wax, carnauba wax, lanolin, jojoba wax, and the like. Anexample of the higher fatty acid may include waxes such as lauric acid,myristic acid, palmitic acid, stearic acid, and behenic acid, higheralcohols such as cetyl alcohol, stearyl alcohol, behenyl alcohol,myristyl alcohol, and cetostearyl alcohol, and the like.

Here, the additive may be included at 0.01 to 20 wt %, specifically 0.01to 10 wt %, or 0.05 to 10 wt %, based on the total weight of thecosmetic composition, but is not limited thereto.

In addition, the cosmetic composition according to an exemplaryembodiment of the present invention may be formulated into a formulationselected from the group consisting of an emollient, an astringent, anutritional toner, an eye cream, a nourishing cream, a massage cream, acleansing cream, a cleansing foam, a cleansing water, a powder, anessence, a face pack, and the like.

Hereinafter, preferred examples will be provided in order to assistunderstanding of the present invention. However, the following Examplesare only provided for easily understanding the present invention and areonly illustrative, and do not limit the scope of the present inventionin any way.

(Evaluation Method)

1. Effect of Inhibiting Expression of PPAR-γ by Western Blot

In the present invention, 1.5×10⁵ (1 mL/well) of human sebocytes wereadhered on a 12-well plate containing a Dulbecco's modified eagle medium(DMEM)/F12 (1:1) containing 10% fetal bovine serum (FBS). Afterculturing for 24 hours, cells were collected after 24 hours from eachsample of a control group (1 μM) in which the medium was replaced with aserum-free medium and previously treated with IGF-1 (50 ng/ml) and anexperimental group in which the control group was treated with Compound1 of Example 1 (20 μM). In addition, in the present invention, thecontrol means a sample which was not treated with IGF-1, and thecomparative group means a sample in which the control group was treatedwith retinoic acid (20 μM). Thereafter, expression of PPAR-γ proteinwhich is a representative lipid synthetic transcription factor ofsebocytes was analyzed by the Western blot, for each of these samples.

The results are shown in the following FIG. 1.

2. Effect of Inhibiting Sebum Secretion

1×10⁵ (1 mL/well) of human sebocytes were adhered on a 12-well platecontaining a Dulbecco's modified eagle medium (DMEM)/F12 (1:1)containing 10% fetal bovine serum (FBS).

In FIG. 2, each sample of a control group (1 μM) which was previouslytreated with IGF-1 (50 ng/ml) after culturing for 24 hours and anexperimental group in which the control group was treated with Compound1 of Example 1 (20 μM) was stained after 24 hours with a 0.5% oil red Osolution for 1 hour and treated with 100% isopropanol, and an absorbancewas measured by a 500 nm ELISA reader.

In FIG. 3, after cells were stained with a Nile red (1 ug/ml) solutionfor 30 minutes, a slide on which one drop of a mounting solution wasdropped was covered with a slide cover to which the stained cells wereadhered, and after the slide was hardened completely, the slide wasobserved with a microscopic image.

The results are shown in the following FIG. 2.

Example 1

Preparation of Compound 1 (S8-002) Step 1) Preparation of4-heptylidene-3-hexyloxetan-2-one (octylketendimer)

90 ml of ethyl acetate was added to a 250 ml reactor under a nitrogenatmosphere, and 13 ml (92.89 mol) of triethyl amine (TEA) was addedthereto. The temperature of the reactor was cooled to 0° C. or lowerusing an ice bath, and 15 g (92.22 mmol) of octanoyl chloride was slowlyadded dropwise. After completing the dropwise addition, the ice bath wasremoved, the temperature of the reactor was slowly raised to roomtemperature, and the reactor was stirred for 12 hours. Purified waterwas added to the reactant, c-HCl was added to lower the pH to 3, thepurified water was further added, and the reactant was stirred.Thereafter, the reactant was allowed to stand and an organic layer wasseparated therefrom. The organic layer was washed with brine once again,and dried with MgSO₄. The filtrate was concentrated under reducedpressure to obtain 4-heptylidene-3-hexyloxetan-2-one (octylketendimer)which is a light yellow liquid.

Thereafter, the product was used in the next step without furtherpurification.

Step 2) Preparation of methyl (2-hexyl-3-oxodecanoyl)alaninate (Compound1, S8-002)

30 ml of methanol was added to a 250 ml reactor, 6.4 g (46.11 mmol) ofalanine methyl ester hydrochloride was added, and 5.1 g (50.72 mmol) ofTEA was added. After the reactant was stirred for 10 minutes, 11.6 g(46.11 mmol) of 4-heptylidene-3-hexyloxetan-2-one was slowly added andstirred for 12 hours. The reaction was confirmed with TLC, and thesolvent was removed by concentration under reduced pressure. Ethylacetate and purified water were added to the concentrate. Thereafter,c-HCl was added to adjust pH to 3, and the reactant was stirred andallowed to stand to separate an organic layer. The organic layer wasdried with MgSO₄, and the filtered filtrate was concentrated underreduced pressure to completely remove the solvent.

Thereafter, the residue was separated with column chromatography(dichloromethane:Methanol=50:1) to obtain methyl(2-hexyl-3-oxodecanoyl)alaninate (Compound 1, S8-002) which is a whitesolid as a title compound (6.2 g, 17.44 mmol, 38% yield).

MS (ESI pos. ion) m/z: 356 (MH+). Calc'd exact mass for C₂₀H₃₇NO₄: 355.¹H NMR (600 MHz, CDCl₃): 6.73 (dd, J=42.6, 7.2 Hz, 1H), 4.56-4.52 (m,1H), 3.74 (d, J=3.0 Hz, 3H), 3.41-3.36 (m, 1H), 2.58-2.49 (m, 2H),1.85-1.79 (m, 2H), 1.57-1.54 (m, 2H), 1.40 (t, J=7.2 Hz, 3H), 1.32-1.24(m, 16H), 0.89-0.85 (m, 6H).

As shown in the following FIG. 1, it was confirmed that PPAR-γ wasactivated by IGF-1 treatment, and activation of PPAR-γ was ratherinhibited by retinoic acid treatment which is a positive control group(comparative group). Furthermore, it was confirmed that the effect ofinhibiting PPAR-γ activity is remarkable by the treatment with Compound1 according to the present invention. Thus, it was confirmed thatCompound 1 according to the present invention is excellent in the effectof inhibiting PPAR-γ activity.

As shown in the following FIG. 2, it was confirmed that according to thecontrol group, the fat content in sebocytes was increased by IGF-1treatment. However, it was confirmed that a sebum production amount wasremarkably decreased by the treatment with Compound 1 according to thepresent invention. In addition, the effect was significantly increaseddepending on the treatment concentration of Compound 1 according to thepresent invention.

In addition, as shown in the following FIG. 3, it was confirmed thatdifferentiation of fat cells is more effectively derived by thetreatment with Compound 1 according to the present invention.

From these results, it is confirmed that the effect of inhibiting sebumhypersecretion according to the present invention is achieved byactivity inhibition of PPAR-γ which is a transcription regulatory factorrelated to sebum production and effective fat cell differentiation.

According to the present invention, there may be provided a cosmeticcomposition for inhibiting sebum hypersecretion which may decrease theactivity of peroxisome proliferator activated receptor gamma (PPAR-γ) toeffectively adjust production of sebum. In addition, since the cosmeticcomposition including the effective component according to the presentinvention has no cytotoxicity and skin side effects, it may be safelyapplied as a cosmetic composition of various formulations.

According to the present invention, hypersecreted sebum is effectivelyinhibited simultaneously with appropriately adjusting sebum production,thereby not only improving skin diseases by hypersecreted sebum but alsoassisting maintenance of an intrinsic function of healthy skin.

Thus, according to the present invention, it is expected that thecosmetic composition may be useful for inhibition, improvement, andprevention of skin disorders or skin diseases caused by hypersecretedsebum, by fundamentally inhibiting sebum overproduction.

The present invention has been described in detail in specific parts,and it is apparent that such specific technique is only an embodiment toa person skilled in the art, without limiting the scope of the presentinvention thereto. Thus, the substantial scope of the present inventionwill be defined by the appended claims and their equivalents.

What is claimed is:
 1. A method of inhibiting sebum hypersecretion, byapplying a compound represented by Chemical Formula 2 as an effectivecomponent on skin:

wherein R1 and R2 are independently of each other (C4-C10) alkyl; R₂₁ ishydrogen or (C1-C7) alkyl; and R₂₃ is (C1-C7) alkyl.
 2. The method ofinhibiting sebum hypersecretion of claim 1, wherein R₂₁ is hydrogen,methyl, ethyl, or n-propyl; and R₂₃ is methyl, ethyl, or n-propyl.